Banner AG4 Series Safety Laser Scanner
34
P/N 144924 05/2009
Product Manual
4.5.5
Scanner-Specific Additional Distance Factors
There are three Scanner-specific factors that must be considered when calculating the Minimum Separation Distance:
Z
sm
& Z
refl
Z
sm
Measurement Tolerance Factor
Z
sm
is the additional distance needed to account for distance measurement error. The value for
Z
sm
is a function of the distance from the
Scanner to the furthest point of the protective field measured along the radial (R
G
in the following examples).
For Vertical Protective Fields (normal approach): Zsm = 0
For Horizontal Protective Fields (parallel approach):
Z
sm
= 83 mm (3.3 in.) for protective fields R
G
< 3500m (138 in)
Z
sm
= 100 mm (4 in.) for protective fields R
G
≥ 3500m (138 in)
Z
refl
Retro Reflector Factor
Z
refl
is the additional distance needed to account for error due to reflections from retro reflective surfaces that are present in the scanning
plane.
No Retro-reflectors: Z
relf
= 0
Retro-reflectors located within the scanning plane of the protective field: Z
relf
= 100 mm (4 in)
WARNING . . . DETERMINE CORRECT STOP TIME
Stop time (
T
s
) must include the response time of all devices or controls that react to stop the machine. If all devices are not
included, the calculated Separation Distance (
D
s
) will be too short. This can lead to serious bodily injury or death. Be sure to
include the stop time of all relevant devices and controls in the calculations.
WARNING . . . PROPER SEPARATION DISTANCE
The protective field must be located far enough from the nearest hazard such that an individual cannot reach the hazard
before cessation of hazardous motion or situation.
Failure to establish and maintain the minimum separation distance
could result in serious bodily injury or death.
